JP5493428B2 - Weather resistance test equipment - Google Patents

Description

  The present invention relates to a weather resistance test apparatus that performs a weather resistance test by irradiating a sample with light.

  2. Description of the Related Art Conventionally, there has been known a test apparatus that places a sample under a light source and irradiates light to test deterioration due to light. (For example, refer to Patent Document 1). In such a test apparatus, a reflector is provided in the vicinity of the light source so that the light from the light source strikes the sample without waste.

Japanese Patent Laid-Open No. 08-271405

As in the configuration described in Patent Document 1, when light is irradiated from one or a small number of light sources to a space in which a plurality of samples are arranged, there is a possibility that unevenness in the amount of light emitted from each sample may occur. Such unevenness in the amount of light contributes to variations in test conditions, so it is desirable to suppress the unevenness. However, a conventional reflector or the like has a semicircular shape as described in Patent Document 1, for example, and aims to guide light emitted in a direction away from the sample to the sample. It did not eliminate unevenness in the amount of light. In addition, as a method for reducing unevenness in the amount of light, a method of diffusing light by embossing the reflecting plate and a method of arranging a large number of reflecting plates have been considered. Since it differs depending on the shape and the like, it cannot be easily solved by a method of simply diffusing or arranging a large number of reflectors, or a method of making the reflector plate a curved surface. Furthermore, the method using a large number of reflectors and the method of embossing also have a problem of increasing the cost.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a weather resistance test apparatus capable of irradiating light uniformly from a linear light source to a plurality of samples.

In order to achieve the above object, a weather resistance test apparatus according to the present invention includes a linear light source, and a longitudinal sample installation surface arranged to face the linear light source along the longitudinal direction of the linear light source. In a weather resistance test apparatus for irradiating light to a sample placed on the sample installation surface by the linear light source, on the sample installation surface side of the linear light source, in a direction away from the sample installation surface A reflection member that reflects light emitted from the linear light source toward the sample installation surface is disposed, and the reflection member is located on an end side of the linear light source and is located on the end side of the sample installation surface. A first reflecting surface for irradiating reflected light to a region close to the end in the longitudinal direction; and the light is reflected at a position closer to the linear light source than the first reflecting surface; reflection in the region of the end than the region where the first reflecting surface is irradiated with light in the direction Having a second reflecting surface that irradiates, characterized.

Moreover, the present invention is characterized in that, in the weather resistance test apparatus, an auxiliary reflecting member constituting the second reflecting surface is fixed on an upper portion of the first reflecting surface .

Furthermore, the present invention provides the weather resistance test apparatus, wherein the reflecting member is disposed on the two first reflecting surfaces respectively disposed on the end side of the linear light source and on the side of the linear light source. And four third surfaces including two third reflecting surfaces (3C, 3C), and an auxiliary reflecting member constituting the second reflecting surface is fixed to each of the first reflecting surfaces . It is characterized by this.

  According to the present invention, when irradiating light to a plurality of samples arranged on a longitudinal sample installation surface by a linear light source, unevenness in the amount of light on the sample installation surface is suppressed, and light is evenly applied to the plurality of samples. Can be irradiated.

It is a partially broken front view which shows the structure of the weather resistance test apparatus which concerns on embodiment. It is a schematic plan view which shows the positional relationship of a sample installation surface and a metal halide lamp. It is a figure which shows the structure of a reflecting plate, (A) is a side view, (B) is P-P 'sectional drawing of (A). It is a figure which shows schematic distribution of reflected light, (A) shows the course of reflected light, (B) shows the irradiation position in a sample stand. It is a figure which shows schematic distribution of reflected light, (A) shows the course of reflected light, (B) shows the irradiation position in a sample stand. It is a figure which shows schematic distribution of reflected light, (A) shows the course of reflected light, (B) shows the irradiation position in a sample stand. It is a figure which shows schematic distribution of reflected light, (A) shows the course of reflected light, (B) shows the irradiation position in a sample stand. It is a graph which shows the illumination intensity distribution in the width direction of a sample installation surface. It is a graph which shows the illumination intensity distribution in the length direction of a sample installation surface.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing a configuration of a weather resistance test apparatus 1 according to an embodiment to which the present invention is applied, in which a part of a housing 10 is broken to show the inside.
A light source housing chamber 11 is provided in the upper part of the weather resistance test apparatus 1, and the light source section 2 having a metal halide lamp 21 as a linear light source is disposed in the light source housing chamber 11. A test tank 12 is provided below the light source chamber 11, and a sample stage 40 on which the sample 4 is placed is installed in the test tank 12. The weather resistance test apparatus 1 is an apparatus for testing the weather resistance of the sample 4 by irradiating the sample 4 placed on the sample stage 40 with ultraviolet light by the light source unit 2.

The metal halide lamp 21 as a test ultraviolet radiation source provided in the light source unit 2 receives power from a ballast (not shown) and emits ultraviolet light having a predetermined wavelength for testing. The metal halide lamp 21 is provided with a water cooling jacket 22 through which cooling water flows, and is fixed to the ceiling of the light source accommodation chamber 11 together with the water cooling jacket 22. The water cooling jacket 22 has a double pipe structure in which cooling water flows between the outer pipe 22A and the inner pipe 22B as shown in FIG. 1 as a partially broken cross section, and the outer pipe 22A and the inner pipe 22B A filter 23 that transmits light having a wavelength for a weather resistance test is disposed in the space. The wavelength range of the light emitted from the metal halide lamp 21 and the wavelength range of the light transmitted by the filter 23 can be appropriately changed according to the purpose and content of the required test.
Moreover, as shown in FIG. 1, the light source part 2 is provided with the reflecting plate 30 which guides the light of the metal halide lamp 21 below. The reflection plate 30 includes an upper reflection plate 31 (curved reflection member) located above the metal halide lamp 21 and a lower reflection plate 32 (reflection member) located below the metal halide lamp 21, and these reflection plates. 30, the sample installation surface 41 is efficiently irradiated with the light emitted from the metal halide lamp 21.

  The sample table 40 has a configuration in which a flat sample installation surface 41 is placed on a pedestal installed on the bottom surface of the test tank 12, and the sample 4 is placed on the sample installation surface 41. The sample setting surface 41 is a plane parallel to the metal halide lamp 21. The pedestal of the sample table 40 is provided with an elevating mechanism (not shown) for elevating the sample setting surface 41, and the height of the sample setting surface 41 can be freely adjusted by this elevating mechanism, for example, the contents of the test and the size of the sample 4 Accordingly, the distance from the metal halide lamp 21 to the sample 4 can be adjusted.

Further, a cooling water circuit 13 is disposed below the test tank 12 in the housing 10. The cooling water circuit 13 includes a pump for sending the cooling water to the water cooling jacket 22, a cooling device for keeping the temperature of the cooling water below a predetermined temperature, a cooling water tank for keeping the amount of circulating cooling water at a sufficient amount, etc. It has.
Further, a control panel 15 in which a touch panel is superimposed on a display panel such as a liquid crystal display panel is disposed on the front surface of the weather resistance test apparatus 1, and the operation state of the weather resistance test apparatus 1 is displayed by the control panel 15. At the same time, input operations such as test conditions of the weather resistance test apparatus 1 can be performed.
Although not shown, the weather resistance test apparatus 1 has a temperature sensor that detects the temperature inside the test tank 12, a heater, a cooling device, and air adjusted by the heater and the cooling device to the test tank 12. It has a function to hold the air temperature in the test tank 12 at a predetermined temperature based on the detection value of the temperature sensor.
The weather resistance test apparatus 1 includes a ballast (not shown) that turns on the metal halide lamp 21, a cooling water circuit 13, the above-described temperature sensor, heater, cooling device, and a control unit 16 connected to the blower fan. Then, each part of the weather resistance test apparatus 1 is controlled by the control unit 16, and the sample 4 is tested under the conditions set by the operation of the control panel 15.

FIG. 2 is a plan view showing a relative positional relationship between the sample setting surface 41 and the metal halide lamp 21. FIG.
As shown in FIG. 2, the sample installation surface 41 on which the samples 4 are arranged side by side is configured in a rectangular shape, and the length direction of the sample installation surface 41 is along the longitudinal direction of the metal halide lamp 21 that is a linear light source. Are arranged as follows. This direction (the length direction of the sample installation surface 41 and the longitudinal direction of the metal halide lamp 21) is defined as a length direction L. The width direction W is the short direction of the sample installation surface 41. The width direction W is a direction orthogonal to the length direction L.
The sample 4 on the sample setting surface 41 is arranged with the surface to be tested facing the metal halide lamp 21 and is fixed to the sample setting surface 41 as necessary.

3A and 3B are diagrams showing the configuration of the reflecting plate 30, where FIG. 3A is a side view and FIG. 3B is a cross-sectional view taken along the line PP ′ of FIG.
As shown in FIGS. 3 (A) and 3 (B), the upper reflector 31 has two curved surfaces extending in the longitudinal direction of the metal halide lamp 21, passing through the axial center of the metal halide lamp 21 and perpendicular to the sample installation surface 41. It has a joined shape and is arranged so as to cover the metal halide lamp 21 from above. The inner side of the upper reflecting plate 31, that is, the metal halide lamp 21 side, has two reflecting surfaces 3A and 3A. These two reflecting surfaces 3A and 3A are smooth surfaces, preferably mirror surfaces. The reflective surfaces 3A and 3A reflect light emitted upward and laterally by the metal halide lamp 21 downward. The three-dimensional shape of the reflecting surface 3A and each reflecting surface to be described later may be selected as appropriate so as to obtain an optimum distribution by, for example, simulation calculation for the light distribution.

On the other hand, the lower reflector 32 is positioned below the metal halide lamp 21 and above the sample installation surface 41. In the present embodiment, the upper reflector 31 and the lower reflector 32 are separated from each other, but may be in contact with each other.
The lower reflecting plate 32 has a quadrangular frustum shape having a taper having a small upper portion and a large lower portion. The two upper and lower surfaces of the quadrangular pyramid are open, and the lower reflector 32 has four planes corresponding to the side surfaces of the truncated pyramid. These four planes are inclined so as to face the sample installation surface 41 side with respect to the direction perpendicular to the sample installation surface 41.

  Of the four planes composing the lower reflector 32, the two planes positioned at both ends in the length direction L of the sample installation surface 41 are the reflection surfaces 3B and 3B (first reflection surfaces), and both ends in the width direction W. The two planes positioned at are defined as reflecting surfaces 3C and 3C. These four reflecting surfaces 3B, 3B, 3C, 3C are formed of smooth mirror surfaces, and reflect the light emitted from the metal halide lamp 21 toward the sample setting surface 41.

  Further, auxiliary reflecting plates 34 and 34 are attached to the two reflecting surfaces 3B and 3B, respectively. Each of the auxiliary reflecting plates 34 and 34 is fixed to the upper part of the reflecting surfaces 3B and 3B, and the surfaces thereof are reflecting surfaces 3D and 3D (second reflecting surfaces) facing the sample setting surface 41. The reflecting surfaces 3D and 3D are inclined more than the reflecting surfaces 3B and 3B with respect to the direction perpendicular to the sample mounting surface 41, and the emitted light of the metal halide lamp 21 is directed in a direction different from the reflecting surfaces 3B and 3B. To reflect.

Each of FIGS. 4 to 7 is a diagram showing the reflection direction of the reflection surfaces 3A, 3B, 3C, and 3D of the reflection plate 30 and the schematic distribution of the reflected light on the sample installation surface 41 in comparison.
FIG. 4 is a diagram showing a schematic distribution of reflected light by the reflecting surfaces 3A and 3A. FIG. 4A shows a positional relationship among the metal halide lamp 21, the upper reflecting plate 31, and the sample setting surface 41 as viewed from the side surface direction. B) shows the distribution of reflected light on the sample mounting surface 41.
As indicated by arrows in FIG. 4 (A), the light emitted upward and laterally from the metal halide lamp 21 is reflected by the reflecting surfaces 3A and 3A and directed downward. It irradiates centering on the area | region located in the both ends of the width direction W shown by 41B. The region 41A is an elongated region centered on the center in the length direction L on the sample installation surface 41. As described above, the upper reflecting plate 31 has two reflecting surfaces 3A and 3A arranged in the width direction W, and the light reflected by one reflecting surface 3A is irradiated to the region 41B on one end side of the sample setting surface 41, and the other The light reflected by the reflective surface 3 </ b> A is applied to the region 41 </ b> B on the other side of the sample installation surface 41.

  On the sample installation surface 41, a large amount of direct light from the metal halide lamp 21 is irradiated at a position corresponding to a position directly below the metal halide lamp 21. Since the metal halide lamp 21 is a light source that emits light by discharging in an elongated tube, the center portion in the longitudinal direction emits the most light. For this reason, the light quantity of direct light from the metal halide lamp 21 is particularly large in the region indicated by reference numeral 41A in FIG. The upper reflecting plate 31 irradiates light toward the regions 41B and 41B located on both sides of the region 41A where a large amount of direct light from the metal halide lamp 21 strikes, whereby the amount of light (illuminance) in the width direction W is uneven (uneven). Reduce.

FIG. 5 is a diagram showing a schematic distribution of reflected light by the reflecting surfaces 3B and 3B. FIG. 5A shows the positional relationship among the reflecting surfaces 3B and 3B, the metal halide lamp 21 and the sample setting surface 41 as viewed from the front. ) Shows the distribution of reflected light on the sample installation surface 41.
As indicated by an arrow in FIG. 5A, among the radiated light radiated obliquely downward from the metal halide lamp 21, the radiated light traveling in the length direction L away from the sample installation surface 41 is reflected on the reflecting surface 3B. 3B is reflected toward the sample installation surface 41. This light is mainly emitted in a concentrated manner in regions indicated by reference numerals 41D and 41D in FIG. Each of the regions 41D and 41D is located at a position shifted from the center in the length direction L of the sample installation surface 41 toward the end side. The regions 41D and 41D are also regions where much direct light from the metal halide lamp 21 is irradiated, but the amount of light is inferior to that of the region 41A (FIG. 4B) because it is not the center in the length direction L. The reflected light reflected by the reflecting surfaces 3A and 3A is applied to the regions 41B and 41B at both ends in the width direction W, whereas the reflecting surfaces are disposed at both ends in the length direction L from the regions 41B and 41B. The reflected light of 3B and 3B is irradiated. Therefore, the unevenness of the light quantity in the length direction L is reduced by irradiating the areas 41D and 41D with the reflected light by the reflecting surfaces 3B and 3B.

FIG. 6 is a diagram showing a schematic distribution of reflected light by the reflecting surfaces 3C and 3C. FIG. 6A shows the metal halide lamp 21, the upper reflecting plate 31, the reflecting surfaces 3C and 3C, and the sample setting surface 41 as viewed from the side surface direction. The positional relationship is shown, and (B) shows the distribution of reflected light on the sample installation surface 41.
As indicated by an arrow in FIG. 6A, the light emitted from the metal halide lamp 21 to the position deviated in the width direction W from the sample setting surface 41 is directed toward the sample setting surface 41 by the reflecting surfaces 3C and 3C. Reflected. Further, a part of the reflected light reflected by the reflecting surfaces 3A and 3A is directed to a position deviating from the sample setting surface 41 in the width direction W, but this light hits the reflecting surfaces 3C and 3C and is reflected again, and the sample setting is performed. The surface 41 is irradiated. Further, of the reflected light from the reflecting surface 3A, light having a small inclination with respect to the sample setting surface 41, that is, light close to a direction parallel to the sample setting surface 41 is reflected by one of the reflecting surfaces 3A and reflected on the opposite side. The light reaches the surface 3C, is reflected, and is further reflected by the reflection surface 3C on the opposite side. This light is repeatedly reflected and applied to the sample mounting surface 41.

The reflected light reflected by the reflecting surfaces 3C and 3C is wide in the width direction W in a wide range from the center portion to the both end portions in the length direction L of the sample mounting surface 41, as indicated by reference numeral 41E in FIG. Is irradiated. Since the reflected light from the two reflecting surfaces 3C and 3C reaches the center of the sample mounting surface 41, the region where the reflected light strikes is a single region 41E. Since the reflecting surfaces 3C and 3C have a shape extending along the longitudinal direction of the metal halide lamp 21, like the reflecting surfaces 3A and 3A, the region 41E is wide in the length direction L. Further, since the reflecting surface 3C is wide in the vertical direction, the light irradiated from the reflecting surface 3C to the sample setting surface 41 is widely distributed on the sample setting surface 41, and a large amount of light is less likely to be biased.
As described above, the reflected light from the reflecting surfaces 3C and 3C is evenly applied to the region 41E corresponding to almost the whole of the sample setting surface 41, so that the light deviating to the side of the sample setting surface 41 is reflected. Reflecting on the surfaces 3C and 3C, it is possible to irradiate the sample mounting surface 41 uniformly with a large amount of light.

FIG. 7 is a diagram showing a schematic distribution of reflected light by the reflecting surfaces 3D and 3D. FIG. 7A shows the positional relationship between the reflecting surfaces 3D and 3D, the metal halide lamp 21 and the sample mounting surface 41 as viewed from the front. ) Shows the distribution of reflected light on the sample installation surface 41.
As shown by the arrows in FIG. 7A, among the radiated light radiated obliquely downward from the metal halide lamp 21, a part of the radiated light directed in the direction away from the sample installation surface 41 in the length direction L is Reflected toward the sample setting surface 41 by the reflecting surfaces 3D and 3D. As described above, the reflecting surfaces 3D and 3D have a larger inclination with respect to the sample mounting surface 41 than the reflecting surfaces 3B and 3B, and the reflecting surfaces 3D and 3D are disposed above the reflecting surfaces 3B and 3B. Therefore, compared to the reflection by the reflection surfaces 3B and 3B, the light emitted from the metal halide lamp 21 has a small inclination with respect to the sample setting surface 41, that is, light close to the direction parallel to the sample setting surface 41 is reflected surface 3D. 3D irradiates the sample installation surface 41 at an angle close to vertical.

Accordingly, as shown in FIG. 7B, the light reflected by the reflecting surfaces 3D and 3D is irradiated to a position close to directly below the reflecting surfaces 3D and 3D. The regions 41F and 41F irradiated with the reflected light from the reflecting surfaces 3D and 3D are located at both ends in the length direction L of the sample installation surface 41, and more than the regions 41D and 41D where the reflected light from the reflecting surface 3B hits. Located on the front end side of the sample mounting surface 41.
As described above, the metal halide lamp 21 which is a linear light source emits the most light at the central portion in the length direction L. Therefore, the region 41F which is the tip portion (terminal portion) in the length direction L of the sample installation surface 41. Then, the amount of light tends to be particularly low. Further, in order to collect the light emitted from the metal halide lamp 21 in the regions 41F and 41F using a flat reflector, the sample mounting surface 41 is located near the metal halide lamp 21 as in the reflective surfaces 3B and 3B. It is necessary to provide a reflector that is nearly vertical. However, the reflecting plate having a position and angle such as the reflecting surfaces 3B and 3B can reflect only part of the light emitted from the metal halide lamp 21 to the outside of the sample setting surface 41. For example, the sample setting surface 41 It is not possible to reflect light that falls off near the position. Furthermore, if light is collected only in the areas 41F and 41F, the light quantity may be biased.

  Therefore, in the weather resistance test apparatus 1, the reflection surfaces 3B and 3B located on the end side in the length direction L of the metal halide lamp 21 and the reflection surfaces 3D and 3D separate from the reflection surfaces 3B and 3B are provided. The reflecting surfaces 3B and 3B reflect light to the regions 41D and 41D located on the end side from the center of the sample setting surface 41, and the reflecting surfaces 3D and 3D are located further to the ends than the regions 41D and 41D. It was set as the structure which reflects light in area | region 41F and 41F. According to this configuration, the light radiated from the metal halide lamp 21 at an angle near the vertical to the sample setting surface 41 is totally reflected from the center in the length direction L of the sample setting surface 41, and at an angle near the horizontal. Since the emitted light is reflected to the tip regions 41F and 41F, the deviation of the light amount on the sample installation surface 41 can be suppressed, and the light of the metal halide lamp 21 can be irradiated evenly on the entire sample installation surface 41.

FIG. 8 is a chart showing the illuminance distribution in the width direction of the sample installation surface 41, and FIG. 9 is a chart showing the illuminance distribution in the length direction of the sample installation surface 41. In the chart of FIG. 8, the horizontal axis indicates the position in the width direction W of the sample setting surface 41, the position W1 corresponds to one end of the sample setting surface, and the position W2 corresponds to the other end. Further, the horizontal axis of the chart of FIG. 9 indicates the position in the length direction L of the sample setting surface 41, the position L1 corresponds to one end of the sample setting surface, and the position L2 corresponds to the other end.
The vertical axis in FIGS. 8 and 9 indicates the relative illuminance magnitude, and the scale in the vertical axis direction does not correspond to the absolute illuminance value. That is, it does not indicate the illuminance value itself in which the size in the vertical axis direction in FIG. 8 is measured. Therefore, the illuminance of each graph indicated by (A) to (C) in FIG. 8 cannot be compared between (A) to (C) with reference to the scale of the vertical axis in FIG. FIG. 8 shows the magnitude of illuminance between positions in the width direction W only for each of (A) to (C). Similarly, in FIG. 9, the size in the vertical axis direction in FIG. 9 does not indicate the illuminance value itself, so that comparison between (A) to (C) is based on the scale of the vertical axis in FIG. 9. Can not. FIG. 9 is a chart showing the magnitude of illuminance between positions in the length direction L for each of (A) to (C).

  8A shows the illuminance due to the direct light of the metal halide lamp 21, FIG. 8B shows the illuminance due to the reflected light reflected by the reflecting surface 3A and applied to the sample installation surface 41, and FIG. 8C shows the reflecting surface. Illuminance by reflected light of 3C is shown.

  As shown in FIG. 8, the direct light from the metal halide lamp 21 has a peak at the center in the width direction W, and the peaks of the reflected light from the reflecting surfaces 3 </ b> A and 3 </ b> A are at both ends in the width direction W. On the other hand, the reflected light from the reflecting surface 3C is uniformly irradiated except in the extreme end region in the width direction W, that is, in the vicinity of the positions W1 and W2. Furthermore, the reflected light from the reflective surface 3A is light emitted from the metal halide lamp 21 to the side and above, and is arranged so that the upper reflector 31 covers the metal halide lamp 21 as shown in FIG. Therefore, the amount of reflected light from the reflecting surfaces 3A and 3A is very large. For this reason, the end of the width direction W is irradiated with the light quantity sufficient to eliminate the direct light of the metal halide lamp 21 and the unevenness of the reflected light by the reflecting surfaces 3C and 3C. As a result, the combined amount of light reflected by the reflecting surfaces 3A and 3A, reflected light by the reflecting surfaces 3C and 3C, and direct light from the metal halide lamp 21 is substantially uniform in the width direction W, and unevenness in illuminance hardly occurs. .

9A shows the illuminance due to the direct light of the metal halide lamp 21, FIG. 9B shows the illuminance due to the reflected light reflected by the reflecting surfaces 3B and 3B and applied to the sample installation surface 41, and FIG. Illuminance by the reflected light of the reflective surfaces 3D and 3D is shown.
As shown in FIG. 9, the direct light from the metal halide lamp 21 has a peak at the center in the length direction L, and the peak of the reflected light from the reflecting surfaces 3B and 3B is closer to the end side than the center in the length direction L. In position. Then, the peak of the reflected light from the reflecting surfaces 3D and 3D is located at the extreme end region in the length direction L, that is, a position very close to the positions L1 and L2. For this reason, as described above, the bias of the reflected light due to the direct light from the metal halide lamp 21 is eliminated by the reflected light from the reflecting surfaces 3B and 3B and the reflected light from the reflecting surfaces 3D and 3D. As a result, the amount of light combined with the reflected light from the reflecting surfaces 3B and 3B, the reflected light from the reflecting surfaces 3D and 3D, and the direct light from the metal halide lamp 21 is substantially uniform in the length direction L. Unevenness of illuminance hardly occurs.

  As described above, the weather resistance test apparatus 1 according to the embodiment to which the present invention is applied includes a metal halide lamp 21 and a sample having a longitudinal shape that is disposed facing the metal halide lamp 21 along the longitudinal direction of the metal halide lamp 21. And a configuration in which the metal halide lamp 21 irradiates the sample with light on the sample installation surface 41, and the length direction from the sample installation surface 41 to the sample installation surface 41 side of the metal halide lamp 21. A lower reflector 32 that reflects light emitted from the metal halide lamp 21 toward the sample installation surface 41 in a direction deviating in the L or width direction W is disposed, and the lower reflector 32 is disposed on the end side of the metal halide lamp 21. Reflecting surfaces 3B and 3B for irradiating reflected light to a region located closer to the end in the longitudinal direction than the center of the sample mounting surface 41, and reflecting surfaces 3B and 3B The reflection surfaces 3D and 3D that irradiate the reflected light to the region closer to the end than the region that irradiates the light. The reflected light reflected by the light hits the areas 41F and 41F on the tip side of the areas 41D and 41D, and the reflected lights of the reflecting surfaces 3D and 3D strike. For this reason, in addition to the strong direct light from the metal halide lamp 21 being applied to the region 41A including the center of the sample setting surface 41, the deviation of the amount of light applied to the sample setting surface 41 causes the reflection surfaces 3B, 3B, 3D, By correcting by 3D, unevenness in the amount of light on the sample setting surface 41 can be suppressed, and the light from the metal halide lamp 21 can be irradiated evenly on the entire sample setting surface 41. A plurality of samples arranged on the sample setting surface 41 4 can be irradiated with light evenly.

  As described above, the uneven reflection of the light on the sample installation surface 41 is eliminated by the configuration in which the auxiliary reflection plate 34 is provided on the four lower reflection plates 32 located below the metal halide lamp 21 and the six reflection surfaces are provided. Therefore, the unevenness in the amount of light can be efficiently reduced with a simple configuration as compared to, for example, using more than 10 reflectors or embossing the reflector to diffuse light. In addition, the reflective surfaces 3B, 3B and 3D, 3D, etc., which are optimal for the shape of the metal halide lamp 21, which is a linear light source, are arranged and the light is not diffused outside the sample installation surface 41, thereby reducing the loss of light quantity and improving the efficiency. A plurality of samples 4 can be irradiated with light evenly.

Further, in the weather resistance test apparatus 1, light emitted from the metal halide lamp 21 by a curved surface extending in the length direction of the metal halide lamp 21 on the opposite side of the sample installation surface 41 across the metal halide lamp 21 is supplied to the sample installation surface 41. Since the upper reflecting plate 31 that irradiates the regions 41B and 41B including the side edges of the upper reflecting plate 31 is disposed, the reflected light of the reflecting surfaces 3A and 3A of the upper reflecting plate 31 is irradiated onto the sample setting surface 41, In combination with the reflected light from the reflecting surfaces 3B, 3B, 3D, and 3D, the unevenness in the amount of light on the sample installation surface 41 can be further reduced.
Furthermore, since all of the reflective surfaces 3A, 3B, 3C, and 3D are formed of smooth mirror surfaces, it is possible to reflect light more efficiently and reduce the loss of light amount.
In addition, the weather resistance test apparatus 1 of the above-described embodiment is configured so that the light radiated out of the sample setting surface 41 out of the radiated light of the metal halide lamp 21 by the reflecting surfaces 3C and 3C of the lower reflecting plate 32 is also used. By collecting in 41, the loss of light quantity can be further reduced. Since the reflective surfaces 3C and 3C are larger in size in the height direction than the reflective surfaces 3D and 3D, etc., the radiated light from the metal halide lamp 21 can be irradiated to almost the entire sample installation surface 41. Thereby, the output of the metal halide lamp 21 required for the test is low, and the life of the metal halide lamp 21 can be extended and the amount of power consumption can be reduced.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
For example, in the above-described embodiment, the auxiliary reflecting plate 34 is fixed to the reflecting surfaces 3B and 3B of the lower reflecting plate 32, and the surface of the auxiliary reflecting plate 34 becomes the reflecting surfaces 3D and 3D. It is good also as a structure which makes a part of surface 3B, 3B protrude and the surface of this protrusion part acts as a reflective surface similar to reflective surface 3D, 3D. Further, the linear light source is not limited to the metal halide lamp 21, and other types of ultraviolet light sources such as a xenon lamp, a carbon arc lamp, and a mercury lamp can be used. Further, in the above-described embodiment, the metal halide lamp 21 is disposed above the horizontally placed sample placement surface 41 and the sample 4 is irradiated with ultraviolet light from above, but the sample placement surface 41 is vertically aligned. The sample mounting surface 41 may be irradiated with ultraviolet light from the side by the metal halide lamp 21. Further, although the reflecting surface 3A of the upper reflecting plate 31 is located from the upper side to the side of the metal halide lamp 21, it may be smaller.

1 Weather resistance test equipment 3A Reflective surface (curved surface)
3B reflective surface (first reflective surface)
3C reflective surface 3D reflective surface (second reflective surface)
4 Sample 21 Metal halide lamp (Linear light source)
30 reflector 31 upper reflector (curved reflector)
32 Lower reflector (reflective member)
40 Sample stand 41 Sample installation surface L Length direction W Width direction

Claims (3)

A linear light source, and a longitudinal sample placement surface disposed opposite the linear light source along the longitudinal direction of the linear light source, and disposed on the sample placement surface by the linear light source. In a weather resistance test apparatus that irradiates light to a sample,
A reflection member that reflects light emitted from the linear light source toward the sample installation surface in a direction away from the sample installation surface is disposed on the sample installation surface side of the linear light source,
The reflective member is a first reflective surface that irradiates reflected light to a region that is located on the end side of the linear light source and is closer to the longitudinal end side than the center of the sample installation surface;
The light is reflected at a position closer to the linear light source than the first reflecting surface, and the first reflecting surface is reflected in a region closer to the end than the region irradiated with light in the length direction of the sample setting surface. Having a second reflecting surface for irradiating light,
A weather resistance testing device characterized by The weather resistance test apparatus according to claim 1,
An auxiliary reflecting member constituting the second reflecting surface is fixed to the upper part of the first reflecting surface ,
A weather resistance testing device characterized by The weather resistance test apparatus according to claim 2,
The reflection member includes two of the first reflection surfaces arranged on the end side of the linear light source and two third reflection surfaces arranged on the sides of the linear light source 4 Has two faces,
An auxiliary reflecting member constituting the second reflecting surface is fixed to each of the first reflecting surfaces ;
A weather resistance testing device characterized by

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